E. Suppose you are standing on the scale in the elevator and the
elevator is accelerating downward with
an acceleration smaller than 9.8 m/s2
i. Draw free-body diagrams of yourself, the scale, and the floor
of the elevator where it interacts
with the scale.
ii. How must the magnitude of the force exerted by the scale on
you compare with your own
weight?
iii. How must the reading on the scale compare with the reading
you make when the elevator is
standing still or moving at uniform velocity?
iv. Is your conclusion about the size of the upward force
exerted on you by the elevator
consistent with the sensation your experience during the short
interval when an elevator
accelerates downward? Explain.
v. How must the total upward force exerted by the cables on the
elevator compare with the total
weight of the elevator and its contents? Explain.
vi. What happens to the magnitude of the reading on the scale
and the total upward pull of the
cables as the acceleration is made larger and larger? Explain.
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E. Suppose you are standing on the scale in the elevator and the elevator is accelerating...
Suppose you are standing on a weighing scale in an elevator that accelerates downward with a magnitude of 9.8 m/s2. The reading of the scale a) is zero b) is less than when the elevator was st rest c) is greater than when the elevator was at rest d) is the same as when the elevator was at rest e) none of these
You are standing on a bathroom scale and you measure the weight to be 120 lb. You then take the scale onto an elevator and stand on the scale as the elevator accelerates, during which the reading on the scale decreases to 90 lb. Which of the following statements about the elevator could be true? A. The elevator is moving upward at 2 m/s while accelerating downward at 2.45 m/s^2. B. The elevator is moving downward at 4 m/s while...
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